Exercise machine



FIG. 1 is a perspective view of a exercise machine showing my new design.

FIG. 2 is a front elevational view thereof.

FIG. 3 is a rear elevational view thereof.

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof.

FIG. 6 is a top plan view thereof.

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is a perspective view thereof, wherein the broken line portions of the exerciser structure are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a exercise machine, as shown and described. 